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The host's WMI system is returning invalid data: in class Win32_LogicalDisk




I have this error on a 'Disk Free' sensor, Target Dell laptop windows 7. The error specifies q: drive, but I dont have a q: drive? I ran the WMI tester and query which accesses my c: drive fine. The query used and results are posted below. Does anybody know how to resolves this?

Last Message: The host's WMI system is returning invalid data: in class Win32_LogicalDisk - q: FreeSpace q: Size To resolve this issue, use Paessler WMI Tester (https://www.paessler.com/tools/wmitester) with the correct query from https://kb.paessler.com/en/topic/8783 to test the accessibility of your WMI counters. (code: PE098)

query used in WMI Tester -

SELECT DriveType,DeviceID,FreeSpace,Size,VolumeName
FROM Win32_LogicalDisk
WHERE DriveType=3

WMI Tester results -


disk-free wmi wmi-tester

Created on May 5, 2022 6:42:17 PM

Last change on May 9, 2022 11:11:06 AM by  Felix Wiesneth [Paessler Support]

1 Reply



The Q drive on a Dell Laptop is usually tied to a Office Click-To-Run Installation as described at Dell here: https://www.dell.com/community/Productivity-Software/Local-disk-Q-MS-office-2010/td-p/3637275

It can be hidden in Explorer by default but might still be picked up using WMI.
You can also use the Disk Management Console Snap-In (diskmgmt.msc) to take a look at all your local drives and verify the drives returned via WMI.

Kind regards,
Johannes Beyerlein, Technical Support Team

Created on May 10, 2022 9:39:17 AM by  Johannes Beyerlein [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.